feat: fix mempool out of sync (#6761)

Description
---
Fixed mempool out-of-sync status when a mempool has just started with no
information.

Motivation and Context
---
Merge mining does not start with a base node that has just started with
an empty mempool.

How Has This Been Tested?
---
System-level testing (merge mining starts immediately after the merge
mining proxy is ready)

What process can a PR reviewer use to test or verify this change?
---
Code review

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Breaking Changes
---

- [x] None
- [ ] Requires data directory on base node to be deleted
- [ ] Requires hard fork
- [ ] Other - Please specify

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applications/minotari_merge_mining_proxy/src/proxy.rs

@@ -920,14 +920,11 @@ impl InnerService {
 
         debug!(
             target: LOG_TARGET,
-            "request: {} ({})",
+            "request - method: {}, uri: {}, headers: {:?}, body: {}",
+            request.method(),
+            request.uri(),
+            request.headers(),
             String::from_utf8_lossy(&request.body().clone()[..]),
-            request
-                .headers()
-                .iter()
-                .map(|(k, v)| format!("{}={}", k, String::from_utf8_lossy(v.as_ref())))
-                .collect::<Vec<_>>()
-                .join(","),
         );
 
         match self.proxy_request_to_monerod(request).await {

base_layer/core/src/base_node/comms_interface/inbound_handlers.rs

@@ -273,7 +273,7 @@ where B: BlockchainBackend + 'static
                 // We need to ensure the mempool has seen the latest base node height before we can be confident the
                 // template is correct
                 while !is_mempool_synced && start.elapsed().as_millis() < MAX_MEMPOOL_TIMEOUT.into() {
-                    if best_block_header.hash() == &last_seen_hash {
+                    if best_block_header.hash() == &last_seen_hash || last_seen_hash == FixedHash::default() {
                         is_mempool_synced = true;
                     } else {
                         tokio::time::sleep(std::time::Duration::from_millis(10)).await;